<!DOCTYPE html>
<html>
<head>
    <title>PlayCanvas Positional Sound</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
    <link rel="icon" type="image/png" href="../playcanvas-favicon.png" />
    <script src="../../build/output/playcanvas.js"></script>
    <style>
        body { 
            margin: 0;
            overflow-y: hidden;
        }
    </style>
</head>

<body>
    <!-- The canvas element -->
    <canvas id="application-canvas"></canvas>

    <!-- The script -->
    <script>
        var canvas = document.getElementById("application-canvas");

        // Create the application and start the update loop
        var app = new pc.Application(canvas);
        app.start();

        // Set the canvas to fill the window and automatically change resolution to be the same as the canvas size
        app.setCanvasFillMode(pc.FILLMODE_FILL_WINDOW);
        app.setCanvasResolution(pc.RESOLUTION_AUTO);

        window.addEventListener("resize", function () {
            app.resizeCanvas(canvas.width, canvas.height);
        });

        // Create an Entity with a camera component
        var camera = new pc.Entity();
        camera.addComponent("camera", {
            clearColor: new pc.Color(1, 0, 0)
        });
        camera.addComponent("audiolistener");
        camera.rotateLocal(-30, 0, 0);
        camera.translateLocal(0, 0, 5);
        app.root.addChild(camera);

        // Create an Entity for the ground
        var material = new pc.StandardMaterial();
        material.diffuse.set(0, 1, 0);
        material.update();

        var ground = new pc.Entity();
        ground.addComponent("model", {
            type: "box",
            material: material
        });
        ground.setLocalScale(50, 1, 50);
        ground.setLocalPosition(0, -0.5, 0);
        app.root.addChild(ground);

        // Create an entity with a light component
        var light = new pc.Entity();
        light.addComponent("light", {
            type: "directional",
            color: new pc.Color(1, 1, 1),
            castShadows: true,
            intensity: 10,
            shadowBias: 0.2,
            shadowDistance: 16,
            normalOffsetBias: 0.05,
            shadowResolution: 2048
        });
        light.setLocalEulerAngles(45, 30, 0);
        app.root.addChild(light);

        var requests = [{
            url: "../assets/sounds/footsteps.mp3",
            type: "audio"
        }, {
            url: "../assets/models/playbot/playbot.json",
            type: "model"
        }, {
            url: "../assets/animations/playbot/playbot-run.json",
            type: "animation"
        }];

        var count = requests.length;
        var assets = [];
        for (var i = 0; i < requests.length; i++) {
            app.assets.loadFromUrl(requests[i].url, requests[i].type, function (err, asset) {
                count--;
                if (count === 0) {
                    var gravel = app.assets.find("footsteps.mp3");
                    var model = app.assets.find("playbot.json");
                    var anim = app.assets.find("playbot-run.json");

                    // Create walking dude
                    var entity = new pc.Entity();

                    // add sound component
                    entity.addComponent('sound');

                    // add footsteps slot
                    entity.sound.addSlot('footsteps', {
                        asset: gravel,
                        pitch: 1.7,
                        loop: true,
                        autoPlay: true
                    });

                    // add model
                    entity.addComponent("model", {
                        type: "asset",
                        asset: model,
                        castShadows: true
                    });

                    // add animation
                    entity.addComponent("animation", {
                        assets: [anim],
                        speed: 0.8
                    });

                    // add entity in the hierarchy
                    app.root.addChild(entity);

                    var pos;
                    var angle = 135;
                    var radius = 3;
                    var height = 0;//1.1;
                    app.on("update", function (dt) {
                        angle += 30*dt;
                        if (angle > 360) {
                            angle -= 360;
                        }
                        var pos = camera.getPosition();
                        entity.setLocalPosition(radius * Math.sin(angle*pc.math.DEG_TO_RAD), height, radius * Math.cos(angle*pc.math.DEG_TO_RAD));
                        entity.setLocalEulerAngles(0, angle+90, 0);
                    });
                }
            });
        };
    </script>
</body>
</html>
